PHYSICAL SCIENCES Grade 11 TERM 1 RESOURCE PACK

PHYSICAL SCIENCES Grade 11

TERM 1

RESOURCE

PACK

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Contents

Worksheets

3

Topic 1: Vectors in Two Dimensions

4

Topic 2: Newton's Laws and Application of Newton's Laws

13

Topic 3: Atomic Combinations (Molecular Structure)

33

Topic 4: Intermolecular Forces and Chemistry of Water

48

Formal Experiment

59

Technical Instructions

61

Newton's Second Law of Motion

64

Marking Guidelines

74

Assessments

81

Topic 1: Vectors in Two Dimensions

82

Topic 2: Newton's Laws and Application of Newton's Laws

89

Topic 3: Atomic Combinations (Molecular Structure)

101

Topic 4: Intermolecular Forces and Chemistry of Water

113

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WORKSHEETS

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RESOURCE PACK

Topic 1 ? Vectors in Two Dimensions

WORKSHEET

1. A forward horizontal force of 50 N is applied to a crate. A second horizontal force of

180 N is applied to the crate in the opposite direction. Determine the magnitude and

direction of the resultant force acting on the crate.

(2)

2. The athlete at point A runs 150 m east, then 70 m west and then 100 m east. Determine

the resultant displacement of the athlete relative to point A.

(2)

3. Three forces act on an object in the vertical plane. Two forces of 500 N and 300 N act

vertically upwards and the third force of 600 N acts vertically downwards. Determine

the resultant force acting on the object.

(2)

4. An aircraft flies 8 km north from an airport and then 12 km east.

4.1 Use the tail-to-head method to draw a neat labelled displacement vector diagram.

Draw in the resultant displacement vector.

(3)

4.2 Determine the magnitude and direction of the resultant displacement of the aircraft

relative to the airport.

(5)

5. Draw the following force vectors (not necessarily to scale) in the Cartesian plane acting from the origin:

5.1 F1 = 20 N acts to the right in the horizontal plane.

5.2 F2 = 50 N acts upwards in the vertical plane.

5.3 F3 = 80 N acts to the left in the horizontal plane.

5.4 F4 = 90 N acts downwards in the vertical plane.

(4)

6. Consider the four forces in question 5.

6.1 Determine the resultant horizontal force and the resultant vertical force.

(4)

6.2 Use the tail-to-tail method to calculate the magnitude and direction of the resultant

of the two forces in Question 6.1. Draw a neat labelled vector diagram to support

your calculation.

(7)

6.3 Now use the tail-to-head method to draw a neat labelled vector diagram.

(3)

7. A drone at point P is flown 2 km north, then 5 km east and then 8 km south. Find the

magnitude and direction of the resultant displacement of the drone from point P. Draw

a neat labelled displacement vector diagram to support your calculation.

(8)

4Grade 11 Physical Sciences

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WORKSHEETS

TOPIC 1: VECTORS IN TWO DIMENSIONS

8. Resolve each of the following vectors into their perpendicular components. In each case draw a neat, labelled vector diagram (not necessarily to scale).

8.1 A 100 N force which acts at 30? above the horizontal.

(6)

8.2 A displacement of 280 m on a bearing of 070?.

(6)

8.3 A 400 N force which acts at 50? to the vertical.

(6)

8.4 A 500 N force which acts at 40? bTeolopwitche1h:oVrizeocnttaol.rs in two dimensio(6n)s

9. Three forces T, F and W act on an object as shown in the diagram below. 9. Three forces T, F and W act on an object as shown in the diagram below.

F = 300 N

T = 100 N

30?

60?

W = 100 N

9.1 Determine the perpendicular components of force F.

(6)

9.2 Determine th9e.1peDrpeetenrdmicinuelarthceompepropneenndticsuolfafrocrocme Tp.onents of force F.

(6)

9.3 Determine th9e.2maDgenteitrumdienaentdhediprecrptieonndoicfutlhaer rceosmulptaonntefnotrscoefafcotricneg Ton the object. Draw a neat l9a.b3elDleedtevermctionredtihaegrmamagtnoitusudpepaonrdt ydoiruercctiaolncuolaf ttihoen.resultant force ac(8ti)ng on the object.

Draw a neat labelled vector diagram to support your calculation.

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Term 15

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